I use everything except the machines - free weight accomplishes more in respect to strength AND I no longer have access to machines. With respect to everything else, should have some variation in these lifts as it "eases" the mind and helps avoid staleness.

Everything except deadlifts are done fairly frequent. I do row more than pull ups as I've found once your able to get a bit of reps under your belt, less frequency (once a week) is perfect. Deads pushed hard are are just to hard to recover from and take away from my other lifts. I back squat 2x a week, front squat once and [squat] clean 3x a week and get A LOT of carry over to my deadlift -- the deadlift however has little carry over to everything else for me personally.